<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <script src="js/vue.js"></script>
  <title>Document</title>
</head>

<body>
  <div id="app">
    {{msg}}
  </div>
</body>
<script>
  new new Vue({
    el: "#app",
    data: {
      msg: "hello VueJs"
    }
  });
</script>

</html>